Sofa



FIG. 1 is a perspective view from the front and right side of a sofa inaccordance with the present design;

FIG. 2 is a perspective view thereof from the front, top and left sidethereof;

FIG. 3 is a perspective view from the left side thereof;

FIG. 4 is a perspective view from the right side thereof; and,

FIG. 5 is a perspective view from the rear thereof.

The bottom of the sofa is not illustrated and forms no part of thepresent design.

The ornamental design for a sofa, as shown and described. 